*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --pudra-bg: #f7ece8;
  --pudra-cream: #faf4f1;
  --pudra-blush: #e8d5d0;
  --pudra-rose: #d4a5a5;
  --pudra-gold: #c4a265;
  --pudra-gold-light: #d4b87a;
  --pudra-text: #5c4a42;
  --pudra-text-light: #8a7a72;
  --pudra-envelope: #e6cfc8;
  --pudra-envelope-dark: #d4b8b0;
  --font-serif: 'Cormorant Garamond', Georgia, serif;
  --font-script: 'Great Vibes', cursive;
  --font-hand: 'Marck Script', cursive;
  --transition: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-serif);
  font-size: 18px;
  line-height: 1.7;
  color: var(--pudra-text);
  background: var(--pudra-bg);
  overflow-x: hidden;
}

body.site-open {
  overflow-y: auto;
}

body.envelope-locked {
  overflow: hidden;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Envelope intro */
.envelope-screen {
  position: fixed;
  inset: 0;
  z-index: 10000;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: clamp(16px, 4vh, 32px);
  min-height: 100vh;
  min-height: 100dvh;
  padding:
    max(16px, env(safe-area-inset-top))
    max(16px, env(safe-area-inset-right))
    max(16px, env(safe-area-inset-bottom))
    max(16px, env(safe-area-inset-left));
  background:
    radial-gradient(ellipse at 50% 30%, rgba(255, 255, 255, 0.5) 0%, transparent 60%),
    var(--pudra-bg);
  transition: opacity 0.9s ease, visibility 0.9s ease;
  -webkit-overflow-scrolling: touch;
}

.envelope-screen.is-hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.envelope {
  --env-w: min(280px, 82vw);
  --env-h: calc(var(--env-w) * 0.667);
  position: relative;
  width: var(--env-w);
  height: var(--env-h);
  flex-shrink: 0;
}

.envelope__body {
  position: relative;
  width: 100%;
  height: 100%;
  perspective: 900px;
  transform-style: preserve-3d;
  -webkit-transform-style: preserve-3d;
}

.envelope__shadow {
  position: absolute;
  bottom: -18px;
  left: 50%;
  width: 90%;
  height: 24px;
  transform: translateX(-50%);
  background: radial-gradient(ellipse, rgba(92, 74, 66, 0.18) 0%, transparent 70%);
  z-index: 0;
}

.envelope__back {
  position: absolute;
  top: 14%;
  right: 0;
  bottom: 0;
  left: 0;
  background: var(--pudra-envelope);
  border-radius: 0 0 6px 6px;
  box-shadow: inset 0 2px 8px rgba(255, 255, 255, 0.35);
}

.envelope__letter {
  position: absolute;
  left: 10%;
  right: 10%;
  bottom: 8%;
  height: 52%;
  padding: clamp(14px, 4vw, 22px) clamp(10px, 3vw, 16px);
  background: #fff;
  border-radius: 6px;
  text-align: center;
  box-shadow: 0 4px 20px rgba(92, 74, 66, 0.15);
  z-index: 10;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px) scale(0.96);
  transition:
    transform 1s cubic-bezier(0.34, 1.2, 0.64, 1) 0.4s,
    opacity 0.5s ease 0.4s,
    visibility 0s linear 0.4s;
  will-change: transform, opacity;
}

.envelope-screen.is-opening .envelope__letter,
.envelope-screen.is-opened .envelope__letter {
  opacity: 1;
  visibility: visible;
  transition:
    transform 1s cubic-bezier(0.34, 1.2, 0.64, 1) 0.4s,
    opacity 0.5s ease 0.4s,
    visibility 0s linear 0s;
  transform: translateY(calc(var(--env-h) * -1.05)) scale(1);
}

.envelope-screen.is-opened .envelope__letter {
  transform: translateY(calc(var(--env-h) * -1.2)) scale(1.04);
  box-shadow: 0 8px 32px rgba(92, 74, 66, 0.2);
  transition:
    transform 0.7s cubic-bezier(0.34, 1.1, 0.64, 1) 0.55s,
    opacity 0.5s ease,
    box-shadow 0.5s ease 0.55s;
}

.envelope__letter-date {
  font-size: clamp(10px, 2.8vw, 13px);
  letter-spacing: clamp(1px, 0.8vw, 3px);
  text-transform: uppercase;
  color: var(--pudra-text-light);
  margin-bottom: 6px;
}

.envelope__letter-names {
  font-family: var(--font-script);
  font-size: clamp(20px, 6.5vw, 34px);
  color: var(--pudra-gold);
  line-height: 1.15;
  max-width: 100%;
}

.envelope__flap {
  position: absolute;
  top: 14%;
  left: 0;
  right: 0;
  height: 50%;
  background: linear-gradient(180deg, var(--pudra-envelope-dark) 0%, var(--pudra-envelope) 100%);
  clip-path: polygon(0 0, 50% 100%, 100% 0);
  transform-origin: top center;
  -webkit-transform-origin: top center;
  transition: transform 0.75s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.45s ease 0.15s;
  z-index: 3;
}

.envelope-screen.is-opening .envelope__flap,
.envelope-screen.is-opened .envelope__flap {
  transform: rotateX(180deg);
  -webkit-transform: rotateX(180deg);
  z-index: 0;
}

.envelope__body {
  transition: transform 0.7s ease 0.55s, opacity 0.55s ease 0.75s;
}

.envelope-screen.is-opened .envelope__body {
  transform: scale(0.94);
  opacity: 0;
}

.envelope__front {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 86%;
  background: var(--pudra-envelope);
  clip-path: polygon(0 100%, 50% 0, 100% 100%);
  z-index: 2;
  pointer-events: none;
  filter: drop-shadow(0 2px 4px rgba(92, 74, 66, 0.08));
}

.envelope__seal {
  position: absolute;
  top: 36%;
  left: 50%;
  transform: translateX(-50%);
  width: clamp(44px, 17vw, 52px);
  height: clamp(44px, 17vw, 52px);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-script);
  font-size: 18px;
  color: #fff;
  background: radial-gradient(circle at 35% 35%, var(--pudra-gold-light), var(--pudra-gold));
  border-radius: 50%;
  box-shadow: 0 4px 14px rgba(196, 162, 101, 0.45);
  z-index: 4;
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.envelope__seal span {
  font-size: 14px;
  margin: 0 1px;
}

.envelope-screen.is-opening .envelope__seal,
.envelope-screen.is-opened .envelope__seal {
  opacity: 0;
  transform: translateX(-50%) scale(0.6);
  -webkit-transform: translateX(-50%) scale(0.6);
}

.envelope__open-btn {
  padding: 14px 32px;
  min-height: 48px;
  font-family: var(--font-serif);
  font-size: 14px;
  letter-spacing: 2px;
  text-transform: lowercase;
  color: var(--pudra-text);
  background: rgba(255, 255, 255, 0.55);
  border: 1px solid rgba(196, 162, 101, 0.35);
  border-radius: 40px;
  cursor: pointer;
  transition: var(--transition);
  animation: pulseBtn 2.5s ease-in-out infinite;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.envelope__open-btn:hover {
  background: #fff;
  border-color: var(--pudra-gold);
}

.envelope-screen.is-opening .envelope__open-btn,
.envelope-screen.is-opened .envelope__open-btn {
  opacity: 0;
  pointer-events: none;
}

.envelope__hint {
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--pudra-text-light);
  opacity: 0.6;
}

.envelope-screen.is-opening .envelope__hint,
.envelope-screen.is-opened .envelope__hint {
  opacity: 0;
}

@keyframes pulseBtn {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.03); }
}

/* Music toggle */
.music-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 9000;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--pudra-gold);
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid rgba(196, 162, 101, 0.3);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(92, 74, 66, 0.1);
  transition: var(--transition);
}

.music-toggle:hover {
  transform: scale(1.05);
}

.music-toggle.is-muted .music-toggle__icon--on {
  display: none;
}

.music-toggle:not(.is-muted) .music-toggle__icon--off {
  display: none;
}

.music-toggle.is-muted .music-toggle__icon--off {
  opacity: 0.4;
}

/* Scroll progress slider */
.scroll-progress {
  position: fixed;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 8000;
  height: min(160px, 28vh);
  width: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}

.scroll-progress__track {
  position: relative;
  width: 3px;
  height: 100%;
  background: rgba(196, 162, 101, 0.2);
  border-radius: 3px;
}

.scroll-progress__thumb {
  position: absolute;
  left: 50%;
  top: 0;
  width: 11px;
  height: 28px;
  margin-left: -5.5px;
  background: linear-gradient(180deg, var(--pudra-gold-light), var(--pudra-gold));
  border-radius: 6px;
  box-shadow: 0 2px 8px rgba(196, 162, 101, 0.35);
  transition: top 0.08s linear;
}

/* Site sections */
.site {
  opacity: 0;
  transition: opacity 0.6s ease 0.3s;
}

.site.is-visible {
  opacity: 1;
}

.section {
  padding: 88px 0;
}

.section__title {
  font-family: var(--font-script);
  font-size: clamp(40px, 8vw, 58px);
  font-weight: 400;
  text-align: center;
  color: var(--pudra-text);
  margin-bottom: 48px;
}

.section__title--left {
  text-align: left;
}

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(247, 236, 232, 0.2) 0%, rgba(247, 236, 232, 0.85) 70%, var(--pudra-bg) 100%),
    url('images/couple.png') center/cover no-repeat;
}

.hero__content {
  position: relative;
  z-index: 2;
  padding: 100px 24px 80px;
  animation: fadeUp 1.2s ease-out;
}

.hero__label {
  font-size: 13px;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--pudra-text);
  font-weight: 500;
  margin-bottom: 16px;
  text-shadow: 0 1px 14px rgba(255, 255, 255, 0.95), 0 0 2px rgba(255, 255, 255, 0.8);
}

.hero__date {
  font-size: clamp(18px, 4vw, 24px);
  letter-spacing: 5px;
  text-transform: uppercase;
  color: var(--pudra-text);
  margin-bottom: 12px;
  text-shadow: 0 1px 12px rgba(255, 255, 255, 0.9);
}

.hero__names {
  font-family: var(--font-script);
  font-size: clamp(56px, 14vw, 100px);
  font-weight: 400;
  color: var(--pudra-text);
  line-height: 1.15;
  margin-bottom: 16px;
}

.hero__names span {
  display: inline-block;
}

.hero__amp {
  font-size: 0.55em;
  color: var(--pudra-gold);
  margin: 0 6px;
}

.hero__venue {
  font-size: 16px;
  letter-spacing: 2px;
  color: var(--pudra-text);
  text-shadow: 0 1px 12px rgba(255, 255, 255, 0.9);
}

.scroll-hint {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  color: var(--pudra-text-light);
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
  z-index: 2;
}

.scroll-hint__line {
  width: 1px;
  height: 36px;
  background: linear-gradient(to bottom, var(--pudra-gold), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

/* Countdown */
.countdown {
  background: var(--pudra-cream);
}

.countdown__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  max-width: 560px;
  margin: 0 auto;
}

.countdown__item {
  text-align: center;
  padding: 24px 12px;
  background: #fff;
  border: 1px solid rgba(196, 162, 101, 0.2);
  border-radius: 4px;
}

.countdown__number {
  display: block;
  font-size: clamp(32px, 7vw, 48px);
  font-weight: 300;
  color: var(--pudra-gold);
  line-height: 1;
  margin-bottom: 6px;
}

.countdown__label {
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--pudra-text-light);
}

/* Story */
.story__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.story__photo-frame {
  position: relative;
  padding: 16px;
  background: #fff;
  border: 1px solid rgba(196, 162, 101, 0.25);
  box-shadow: 0 16px 40px rgba(92, 74, 66, 0.08);
}

.story__photo {
  display: block;
  width: 100%;
  aspect-ratio: 3/4;
  object-fit: cover;
  object-position: center top;
}

.story__text p {
  margin-bottom: 18px;
  color: var(--pudra-text-light);
  font-size: 18px;
}

.story__signature {
  font-family: var(--font-hand);
  font-size: 28px;
  color: var(--pudra-gold);
  margin-top: 24px !important;
}

/* Venues slider */
.venues {
  background: var(--pudra-cream);
  text-align: center;
}

.venues__intro {
  margin: -32px auto 40px;
  max-width: 420px;
  color: var(--pudra-text-light);
  font-size: 17px;
}

.venue-slider {
  position: relative;
  max-width: 520px;
  margin: 0 auto 32px;
}

.venue-slider__viewport {
  overflow: hidden;
  border-radius: 8px;
}

.venue-slider__track {
  display: flex;
  transition: transform 0.45s cubic-bezier(0.4, 0, 0.2, 1);
}

.venue-card {
  flex: 0 0 100%;
  background: #fff;
  border: 1px solid rgba(196, 162, 101, 0.2);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 12px 32px rgba(92, 74, 66, 0.08);
}

.venue-card__image {
  height: 220px;
  background: linear-gradient(135deg, #d8cbc4 0%, #bdaea5 100%);
}

.venue-card__image img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.venue-card__body {
  padding: 24px 20px 28px;
  text-align: center;
}

.venue-card__body h3 {
  font-size: 24px;
  font-weight: 500;
  margin-bottom: 8px;
  color: var(--pudra-text);
}

.venue-card__body p {
  font-size: 16px;
  color: var(--pudra-text-light);
  line-height: 1.6;
}

.venue-slider__arrow {
  position: absolute;
  top: 42%;
  transform: translateY(-50%);
  width: 36px;
  height: 36px;
  font-size: 28px;
  line-height: 1;
  color: var(--pudra-gold);
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(196, 162, 101, 0.25);
  border-radius: 50%;
  cursor: pointer;
  z-index: 2;
  transition: var(--transition);
}

.venue-slider__arrow:hover {
  background: #fff;
  box-shadow: 0 4px 12px rgba(92, 74, 66, 0.12);
}

.venue-slider__arrow--prev {
  left: -12px;
}

.venue-slider__arrow--next {
  right: -12px;
}

.venue-slider__dots {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 20px;
}

.venue-slider__dot {
  width: 8px;
  height: 8px;
  padding: 0;
  border: none;
  border-radius: 50%;
  background: rgba(196, 162, 101, 0.25);
  cursor: pointer;
  transition: var(--transition);
}

.venue-slider__dot.is-active {
  background: var(--pudra-gold);
  transform: scale(1.2);
}

/* Program */
.program {
  background: #fff;
}

.timeline {
  max-width: 560px;
  margin: 0 auto;
  position: relative;
}

.timeline__day {
  display: flex;
  align-items: center;
  gap: 20px;
  margin: 18px 0 8px;
  padding: 20px 22px;
  background: linear-gradient(135deg, rgba(250, 244, 241, 0.95), rgba(232, 213, 208, 0.75));
  border: 1px solid rgba(196, 162, 101, 0.22);
  border-radius: 14px;
  box-shadow: 0 10px 26px rgba(92, 74, 66, 0.08);
}

.timeline__day-number {
  flex-shrink: 0;
  width: 64px;
  height: 64px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: linear-gradient(180deg, var(--pudra-gold-light), var(--pudra-gold));
  color: #fff;
  font-size: 28px;
  font-weight: 600;
  line-height: 1;
  box-shadow: 0 6px 18px rgba(196, 162, 101, 0.28);
}

.timeline__day-content h3 {
  font-size: 24px;
  font-weight: 500;
  margin-bottom: 2px;
  color: var(--pudra-text);
}

.timeline__day-content p {
  font-size: 14px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--pudra-text-light);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 58px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--pudra-gold);
  opacity: 0.25;
}

.timeline__item {
  display: flex;
  gap: 28px;
  padding: 20px 0;
  position: relative;
}

.timeline__item::before {
  content: '';
  position: absolute;
  left: 52px;
  top: 28px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--pudra-gold);
  border: 3px solid #fff;
  box-shadow: 0 0 0 1px rgba(196, 162, 101, 0.3);
}

.timeline__time {
  flex-shrink: 0;
  width: 58px;
  min-width: 58px;
  font-size: 18px;
  font-weight: 500;
  color: var(--pudra-gold);
  text-align: right;
  font-variant-numeric: tabular-nums;
  padding-right: 4px;
}

.timeline__content {
  padding-left: 28px;
}

.timeline__content h3 {
  font-size: 22px;
  font-weight: 500;
  margin-bottom: 4px;
}

.timeline__content p {
  color: var(--pudra-text-light);
  font-size: 16px;
}

/* Dress code */
.dress-code {
  background: var(--pudra-blush);
}

.dress-code__intro,
.dress-code__footer {
  max-width: 520px;
  margin: -32px auto 40px;
  text-align: center;
  color: var(--pudra-text-light);
  font-size: 17px;
}

.dress-code__footer {
  margin: 40px auto 0;
  font-style: italic;
  opacity: 0.85;
}

.fabric-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 24px 20px;
  max-width: 720px;
  margin: 0 auto;
}

.fabric-card {
  width: 100px;
  text-align: center;
}

.fabric-card__frame {
  padding: 8px;
  background: rgba(255, 255, 255, 0.5);
  border: 1px solid rgba(196, 162, 101, 0.25);
  transition: var(--transition);
}

.fabric-card:hover .fabric-card__frame {
  transform: translateY(-4px);
  box-shadow: 0 12px 24px rgba(92, 74, 66, 0.1);
}

.fabric-card__frame img {
  display: block;
  width: 100%;
  height: auto;
}

.fabric-card__name {
  display: block;
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--pudra-text);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 14px 32px;
  font-family: var(--font-serif);
  font-size: 13px;
  letter-spacing: 2px;
  text-transform: uppercase;
  text-decoration: none;
  border: 1px solid var(--pudra-gold);
  cursor: pointer;
  transition: var(--transition);
}

.btn--primary {
  background: var(--pudra-gold);
  border-color: var(--pudra-gold);
  color: #fff;
}

.btn--primary:hover {
  background: var(--pudra-gold-light);
  border-color: var(--pudra-gold-light);
}

.btn--outline {
  background: transparent;
  color: var(--pudra-text);
}

.btn--outline:hover {
  background: rgba(255, 255, 255, 0.6);
}

.btn--full {
  width: 100%;
}

.btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

/* RSVP */
.rsvp__subtitle {
  text-align: center;
  color: var(--pudra-text-light);
  margin: -32px auto 36px;
  font-size: 16px;
}

.rsvp__form {
  max-width: 480px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 12px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--pudra-text-light);
  margin-bottom: 8px;
}

.form-group input[type="text"],
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 14px 16px;
  font-family: var(--font-serif);
  font-size: 17px;
  color: var(--pudra-text);
  background: #fff;
  border: 1px solid rgba(196, 162, 101, 0.25);
  border-radius: 2px;
  outline: none;
  transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--pudra-gold);
}

.radio-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.radio-label {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  font-size: 17px;
  text-transform: none;
  letter-spacing: 0;
}

.radio-label input {
  accent-color: var(--pudra-gold);
  width: 18px;
  height: 18px;
}

.rsvp__error {
  margin-bottom: 16px;
  padding: 12px 16px;
  font-size: 15px;
  color: #8b3a3a;
  background: rgba(139, 58, 58, 0.08);
  border: 1px solid rgba(139, 58, 58, 0.18);
  border-radius: 2px;
}

.rsvp__success {
  text-align: center;
  max-width: 400px;
  margin: 0 auto;
  padding: 40px 24px;
  animation: fadeUp 0.6s ease-out;
}

.rsvp__success-icon {
  font-size: 44px;
  margin-bottom: 12px;
}

.rsvp__success h3 {
  font-family: var(--font-script);
  font-size: 40px;
  color: var(--pudra-gold);
  margin-bottom: 10px;
}

.rsvp__success p {
  color: var(--pudra-text-light);
}

/* Footer */
.footer {
  text-align: center;
  padding: 56px 24px;
  background: var(--pudra-text);
  color: rgba(255, 255, 255, 0.65);
}

.footer__names {
  font-family: var(--font-script);
  font-size: 36px;
  color: var(--pudra-gold-light);
  margin-bottom: 8px;
}

.footer__date {
  font-size: 13px;
  letter-spacing: 4px;
  margin-bottom: 20px;
}

.footer__copy {
  font-size: 13px;
  opacity: 0.5;
}

/* Animations */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.35; transform: scaleY(0.85); }
  50% { opacity: 1; transform: scaleY(1); }
}

.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Responsive */
@media (max-width: 900px) {
  .story__grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .story__photo-frame {
    max-width: 360px;
    margin: 0 auto;
  }
}

@media (max-width: 768px) {
  .envelope__body {
    perspective: none;
    transform-style: flat;
  }

  .envelope__flap {
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
  }

  .envelope-screen.is-opening .envelope__flap,
  .envelope-screen.is-opened .envelope__flap {
    transform: translateY(-8%) scaleY(0.15);
    -webkit-transform: translateY(-8%) scaleY(0.15);
    opacity: 0;
  }

  .envelope-screen.is-opening .envelope__letter,
  .envelope-screen.is-opened .envelope__letter {
    transform: translateY(calc(var(--env-h) * -1.1)) scale(1);
  }

  .envelope-screen.is-opened .envelope__letter {
    transform: translateY(calc(var(--env-h) * -1.25)) scale(1.04);
  }
}

@media (max-width: 640px) {
  .envelope-screen {
    gap: 20px;
  }

  .envelope__hint {
    font-size: 10px;
    letter-spacing: 1.5px;
    opacity: 0.75;
  }

  .section {
    padding: 72px 0;
  }

  .countdown__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .venue-slider__arrow--prev {
    left: 4px;
  }

  .venue-slider__arrow--next {
    right: 4px;
  }

  .scroll-progress {
    right: 6px;
    height: 120px;
  }

  .timeline {
    padding-left: 4px;
    padding-right: 4px;
  }

  .timeline__day {
    gap: 14px;
    padding: 16px;
  }

  .timeline__day-number {
    width: 52px;
    height: 52px;
    font-size: 22px;
  }

  .timeline__day-content h3 {
    font-size: 20px;
  }

  .timeline__day-content p {
    font-size: 12px;
    letter-spacing: 1.5px;
  }

  .timeline::before {
    left: 62px;
  }

  .timeline__item::before {
    left: 56px;
  }

  .timeline__time {
    width: 54px;
    min-width: 54px;
    font-size: 15px;
    text-align: right;
  }

  .timeline__content {
    padding-left: 16px;
    min-width: 0;
  }
}

@media (min-width: 768px) {
  .scroll-progress {
    right: 20px;
    height: 200px;
  }
}